Properties of the Number 64880

Sixty-Four Thousand Eight Hundred Eighty

Basics

Value: 64879 → 64880 → 64881

Parity: even

Prime: No

Previous Prime: 64879

Next Prime: 64891

Digit Sum: 26

Digital Root: 8

Palindrome: No

Factorization: 2 ⁴ × 5 × 811

Divisors: 1, 2, 4, 5, 8, 10, 16, 20, 40, 80

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 1111110101110000

Octal: 176560

Duodecimal: 31668

Hexadecimal: fd70

Square: 4209414400

Square Root: 254.7155275989275

Classification

Fibonacci: No

Bell Number: No

Factorial Number: No

Regular Number: No

Perfect Number: No

Special

Kaprekar Constant: No

Munchausen Constant: No

Armstrong Number: No

Kaprekar Number: No

Catalan Number: No

Vampire Number: No

Taxicab Number: No

Super Prime: No

Friedman Number: No

Fermat Number: No

Cullen Number: No

OEIS Sequences

Number of caps (also clutter partitions) of clutters (connected antichains) spanning n vertices. A317634

a(n) is the total number of down steps between the (n-1)-th and n-th up steps in all 3_1-Dyck paths of length 4·n. A 3_1-Dyck path is a lattice path with steps (1, 3), (1, -1) that starts and ends at y = 0 and stays above the line y = -1. A334979

Harmonic Molien series for Conway group Con.0. A8924

Triangle T(n, k) = T(n-1, k) + T(n-1, k-1) + ((n+1)*(n+2)/2)*T(n-2, k-1), read by rows. A154227

Row sums of triangle A064879. A64880